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Response of Pityophthorus puberulus (Coleoptera: Curculionidae: Scolytinae) to pheromones and terpenes

Published online by Cambridge University Press:  02 April 2012

A.M. Brauner  and
Peter de Groot
A.M. Brauner
Affiliation:
Faculty of Forestry, University of Toronto, 33 Wilcocks Street, Toronto, Ontario, Canada M5S 3B3
Peter de Groot*
Affiliation:
Natural Resources Canada, Canadian Forest Service, Great Lakes Forestry Centre, 1219 Queen Street East, Sault Ste. Marie, Ontario, Canada P6A 2E5
*
2Corresponding author (e-mail: [email protected]).
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Abstract

In field studies conducted to improve trapping programs for the white pine cone beetle, Conophthorus coniperda (Schwarz), a twig beetle, Pityophthorus puberulus (LeConte), a common associate of eastern white pine, Pinus strobus L. (Pinaceae), in seed orchards, was also captured. In these experiments, P. puberulus was attracted to traps containing the sex pheromone pityol with or without the monoterpenes (−)-α-pinene and (−)-β-pinene, but attraction to traps was inhibited when S-(−)-limonene was present. We speculate that limonene may play an important role in host recognition and suitability, by indicating a resource suitable for C. coniperda but unsuitable for P. puberulus.

Résumé

Des études de terrain menées pour améliorer les programmes de piégeage du scolyte des cônes du pin blanc, Conophthorus coniperda (Schwarz) ont permis de récolter aussi un scolyte des rameaux, Pityophthorus puberulus (LeConte), un insecte couramment associé aux pins blancs, Pinus strobus L. (Pinaceae), dans les pépinières à graines. Dans ces expériences, P. puberulus était attiré par les pièges appâtés avec la phéromone pityol avec ou sans les monoterpènes (-)-α-pinène et (-)-β-pinène; l'attraction des pièges est cependant inhibée par la présence de S-(-)limonène. Nous pensons que la limonène joue peut-être un rôle important dans la reconnaissance des hôtes et leur convenance, en identifiant les ressources appropriées à C. coniperda, mais non à P. puberulus.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 139 , Issue 5 , October 2007 , pp. 742 - 747
Copyright
Copyright © Entomological Society of Canada 2007

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